Method and device for determining persistent listen-before-talk failure, and storage medium

Abstract

A method for determining a persistent listen-before-talk (LBT) failure is applied to a terminal, and includes: determining a first transmission resource, wherein the first transmission resource includes a subset of resources used by the terminal for a sidelink transmission on an unlicensed frequency; and in response to determining that a number of failures of the terminal performing LBT using the first transmission resource satisfies a preset condition, determining that a persistent LBT failure occurs in the first transmission resource.

1 . A method for determining a persistent listen-before-talk (LBT) failure, applied to a terminal, comprising:
 determining a first transmission resource, wherein the first transmission resource comprises a subset of resources used by the terminal for a sidelink transmission on an unlicensed frequency; and   in response to determining that a number of failures of the terminal performing LBT using the first transmission resource satisfies a preset condition, determining that a persistent LBT failure occurs in the first transmission resource.   
     
     
         2 . The method of  claim 1 , wherein the preset condition comprises:
 a condition where the number of failures is greater than or equal to a statistical number threshold corresponding to the first transmission resource, wherein the number of failures is a numerical value obtained, in a case where the terminal fails to perform the LBT using the first transmission resource, by adding a preset step length to a value of a failure statistical parameter corresponding to the first transmission resource.   
     
     
         3 . The method of  claim 2 , wherein there are a plurality of first transmission resources, and different first transmission resources correspond to different failure statistical parameters; or
 there are a plurality of first transmission resources, and different first transmission resources correspond to different statistical number threshold.   
     
     
         4 . (canceled) 
     
     
         5 . The method of  claim 2 , further comprising:
 in a case where the terminal does not fail to perform the LBT using the first transmission resource again within a first target duration after the terminal fails to perform the LBT using the first transmission resource, setting the value of the failure statistical parameter to a preset initial number.   
     
     
         6 . The method of  claim 5 , wherein in a case where the terminal does not fail to perform the LBT using the first transmission resource again within the first target duration after the terminal fails to perform the LBT using the first transmission resource, setting the value of the failure statistical parameter to the preset initial number, comprises:
 starting, in a case where the terminal fails to perform the LBT using the first transmission resource, a first timer corresponding to the first transmission resource according to the first target duration; and   setting the value of the failure statistical parameter to the preset initial number after the first timer times out.   
     
     
         7 . The method of  claim 6 , wherein there are a plurality of first transmission resources, and different first transmission resources correspond to different first timers. 
     
     
         8 . The method of  claim 2 , wherein the statistical number threshold is obtained by:
 determining, in response to receiving a first parameter sent by an access network device or another terminal, the statistical number threshold corresponding to the first transmission resource.   
     
     
         9 . The method of  claim 5 , wherein the first target duration is obtained by:
 determining, in response to receiving a second parameter sent by an access network device or another terminal, the first target duration.   
     
     
         10 . The method of  claim 1 , wherein in response to determining that the persistent LBT failure occurs in the first transmission resource, the method further comprises:
 sending a failure indication to an access network device, wherein the failure indication is configured to indicate that the terminal triggers the persistent LBT failure.   
     
     
         11 . The method of  claim 10 , wherein the failure indication comprises a resource identification corresponding to the first transmission resource. 
     
     
         12 . The method of  claim 1 , further comprising:
 in response to determining that the persistent LBT failure occurs in the first transmission resource, selecting other resources corresponding to the sidelink except the first transmission resource for sidelink communication.   
     
     
         13 . The method of  claim 1 , further comprising:
 selecting other resources corresponding to the sidelink except the first transmission resource for sidelink communication within a second target duration after determining that the persistent LBT failure occurs in the first transmission resource.   
     
     
         14 . The method of  claim 13 , wherein selecting other resources corresponding to the sidelink except the first transmission resource for sidelink communication within the second target duration after determining that the persistent LBT failure occurs in the first transmission resource, comprises:
 starting, in response to determining that the persistent LBT failure occurs in the first transmission resource, a second timer corresponding to the first transmission resource according to the second target duration; and   selecting, in response to the second timer not timing out, other resources corresponding to the sidelink except the first transmission resource for sidelink communication.   
     
     
         15 . The method of  claim 13 , wherein the second target duration is obtained by:
 determining, in response to receiving a third parameter sent by an access network device or another terminal, the second target duration.   
     
     
         16 . The method of  claim 1 , wherein the first transmission resource comprises one or more of a sidelink transmission resource pool and a sidelink frequency resource. 
     
     
         17 . A method for determining a persistent listen-before-talk (LBT) failure, applied to an access network device, comprising:
 determining a first parameter; and   sending the first parameter to a terminal, wherein the first parameter is configured to instruct the terminal to determine a statistical number threshold corresponding to a first transmission resource, and further configured to instruct the terminal to determine, according to the statistical number threshold and a number of failures of the terminal performing LBT using the first transmission resource, whether a persistent LBT failure occurs in the first transmission resource, wherein the first transmission resource comprises a subset of resources used by the terminal for a sidelink transmission on an unlicensed frequency.   
     
     
         18 . (canceled) 
     
     
         19 . (canceled) 
     
     
         20 . The method of  claim 17 , further comprising:
 receiving a failure indication sent by the terminal, wherein the failure indication is configured to indicate that the terminal triggers the persistent LBT failure; and   allocating a second transmission resource of the sidelink to the terminal according to the failure indication, wherein the second transmission resource is different from the first transmission resource.   
     
     
         21 - 23 . (canceled) 
     
     
         24 . A device for determining a persistent listen-before-talk (LBT) failure, comprising:
 a processor; and   a memory for storing instructions executable by the processor;   wherein the processor is configured to:
 determine a first transmission resource, wherein the first transmission resource comprises a subset of resources used by the terminal for a sidelink transmission on an unlicensed frequency; and 
 in response to determining that a number of failures of the terminal performing LBT using the first transmission resource satisfies a preset condition, determine that a persistent LBT failure occurs in the first transmission resource. 
   
     
     
         25 . A non-transitory computer-readable storage medium having computer program instructions stored thereon, wherein when the computer program instructions are executed by a processor, the processor is caused to perform the method according to  claim 1 . 
     
     
         26 . (canceled) 
     
     
         27 . A device for determining a persistent listen-before-talk (LBT) failure, comprising:
 a processor; and   a memory for storing instructions executable by the processor;   wherein the processor is configured to perform the method of  claim 17 .